Prosper van dhh jvekchove



(No Model.)

P. VANDEN KERCHOVE.

DEVICE FOR COOLING MACHINE TOOLS.

No. 354.498. Patented Dec. 14, 1886.

U ITED STATES PAT NT OFFICE.

rnos rnn VAN EN 'irnn'cnovn', OF crrnn'r, nn'cuium.

,DEVIJCEWFO'R COOLING MACHINE-TOOLS.

SPECIFICATION forming am: Letters Patent No. 354,498, dated December 1-, 1886. Application flied July 22, l8S6. Serinl' No. 208,809, (No model.)' Patented in Belgium anuary 1886, K0. H.601.

To ztZZ whom it may concerm ,wBe ihknown that I, PRosPnR VAN DEN KERCHOVE, of Ghcnt,.i'n the Province of East "Flanders, in the Kingdom of Belgium, have invented a certain'new'and useful Improve- ;ment in Means for Cooling Machine-Tools, of

which the followi rig is a Specification. In the working of all drilling, planing, boring, milling, turning, and other machine-tools I there is danger of the cutting-edge of the tool proper becoming heated, so as to lose its temper, especially if it is attempted to'increase the speed of the machine beyond certain limits. J have devised simple and etficient means for keeping the cutter cool, so that it is possible to drivemachine tools at higher rates of speed, and thereby materially increase the yield of work accomplished. I artificially cool air or otherfluid and deliver it in one or more streamsiupon the cutter near the cutting-edge by a tube'equipped with a suitable nozzle.

' The accompanyingdrawings form a part of this specification.

tudinal section through the delivering-nozzle,

with an elevation of the lathe-tool and the rest therefor in the act of turning a chip from wrought-iron.

Figure 1 shows the tool with its cutting-edge directed downward.- Fig. 2 shows the same 0 or a corresponding tool mounted with its outting-edge presented upward. In this figure thesha't't or other article to be turned is revolved in the opposite direction to that in Fig. 1. Fig. 3 is a perspective view of a ma- 5 chine for compressing air with'a view to obtaining cold by its subsequent expansion. Similar letters of reference indicate correspendingparts in all the figures where they.-

is equipped with "a collar, D, and with'a'nut,

Dfiwhich Zatter applies on the nozzle.

E is a machine for compressing, cooling, and eiqianding air. I prefer what are known as f H The Gold-Air Machines;" but any apparars which will deliver a constant stream of air at a low temperature may be used instead.

Each represents a l0ngi-' F is a rubber hose connecting the cold-air machine E with the di charge-nozzle D. The arrangement allows the tool-rest A, and consequentl y the tool B, to traverse backward and forward along .the 'shaft M, and also to be adjusted forward'and backward without disturb ingthe connections In all the movemeutsthc nozzleD delivers a jet of cold air constantly on the same point on the cutter B'a point close to or at the cutting-point.

In the ordinary working of the apparatus cold dry air will be delivered through the nozzle D, and by rapidly abstracting heat from the tool B near the cutting-edge will maintain the low temperature desired at the cutting point.

The apparatus may be varied in its action by delivering a small quantity of water with the air.

Inasmuch as the quality of the work accomplished by the cutter remains substantially the same,my invention, by allowing a marked increase in the speed, secures a net increase in the amount of work accomplished by the tool. This is important in saving the time of the attendant, and in shops which are greatly driven in saving time in the employment 01 the machine. 'lhcse constitute important factors in the profitable working of machinetools.

I can eject artificially-cooled water instead of air, the water being either pure or more or less saturated with bicarbonate of soda or other suitable ingredient to lubricate and prevent rusting, in addition to the principal function 'of cooling.

My invent-ion differs materially from the ordinary plans of presenting water, oil, or other 'fluid to a small jet at ordinary temperatures. My invention abstracts the heat so rapidly and holds the metal close to the cutting-edge at so low a temperature that the cutter ma serve perfectly with a much higher speed of rotation of the article being turned than be employed with any means previously known to me.

The invention may apply to planers and to the whole line of cutting-tools employed in a.

machine-shop,t-aking care to employ in each ruse a suflicicntlyilong flexible hose, and in the case of quickly-working planers to properly suspend'the hose. Itis especially valuaible with milling-tools. and in treating by cold 1 ,w temperature, the'flexible' hose F; nozzle D;

ism-y air 'ai onomnterial in whion tho one of water, oil, and other ordinary cooling. agents isv not pgrmi'ssible. h v

; I claim as my invention-- *1 v "aso'aoa.

so as toibo, carried therewith; substantially as,

herein apecifiedr i In tostimony whereof Ihave hereunto set niy:

hand atfiheiat, Bolgi nm, this 9th day of June,

,Q'Iheapparatus E; for delivering fluid at o 1886; injtho'pre snc'e of two snbscribin'g'witr5 withoach other and'with the cutter. of d lathe or othormchine tool; and'urith a connection',.'

to as 0, 'forsupporting the nozzle on tho tool-refit and holding means, as D'D', incombingtion .VAN DENKEROHOVE;

I [Witnessesz GQWESTE'BLIHOK. 

